<?php
/**
 * Զ��HTTP����
 * @param string $url �򿪵�url������ http://www.baidu.com/123.htm
 * @param int $limit ȡ���ص����ݵĳ���
 * @param string $post Ҫ���͵� POST ���ݣ���uid=1&password=1234
 * @param string $cookie Ҫģ��� COOKIE ���ݣ���uid=123&auth=a2323sd2323
 * @param string $ip IP��ַ
 * @param int $timeout ���ӳ�ʱʱ��
 * @param int $block �Ƿ�Ϊ����ģʽ 1Ϊ����ģʽ
 * @return  string  ȡ�����ַ��� ʧ�ܷ���''
 */
function web_http($url, $limit = 0, $post = '', $cookie = '', $ip = '', $timeout = 10, $block = 1)
{
    $return = '';
    $matches = parse_url($url);
    !isset($matches['host']) && $matches['host'] = '';
    !isset($matches['path']) && $matches['path'] = '';
    !isset($matches['query']) && $matches['query'] = '';
    !isset($matches['port']) && $matches['port'] = '';
    $host = $matches['host'];
    $path = $matches['path'] ? $matches['path'] . ($matches['query'] ? '?' . $matches['query'] : '') : '/';
    $port = !empty($matches['port']) ? $matches['port'] : 80;
    if ($post) {
        $out = "POST $path HTTP/1.0\r\n";
        $out .= "Accept: */*\r\n";
        //$out .= "Referer: $boardurl\r\n";
        $out .= "Accept-Language: zh-cn\r\n";
        $out .= "Content-Type: application/x-www-form-urlencoded\r\n";
        $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
        $out .= "Host: $host\r\n";
        $out .= 'Content-Length: ' . strlen($post) . "\r\n";
        $out .= "Connection: Close\r\n";
        $out .= "Cache-Control: no-cache\r\n";
        $out .= "Cookie: $cookie\r\n\r\n";
        $out .= $post;
    } else {
        $out = "GET $path HTTP/1.0\r\n";
        $out .= "Accept: */*\r\n";
        //$out .= "Referer: $boardurl\r\n";
        $out .= "Accept-Language: zh-cn\r\n";
        $out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
        $out .= "Host: $host\r\n";
        $out .= "Connection: Close\r\n";
        $out .= "Cookie: $cookie\r\n\r\n";
    }
    $fp = @fsockopen(($ip ? $ip : $host), $port, $errno, $errstr, $timeout);
    if (!$fp) {
        return '';//note $errstr : $errno \r\n
    } else {
        stream_set_blocking($fp, $block);
        stream_set_timeout($fp, $timeout);
        @fwrite($fp, $out);
        $status = stream_get_meta_data($fp);
        if (!$status['timed_out']) {
            while (!feof($fp)) {
                if (($header = @fgets($fp)) && ($header == "\r\n" || $header == "\n")) {
                    break;
                }
            }

            $stop = false;
            while (!feof($fp) && !$stop) {
                $data = fread($fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit));
                $return .= $data;
                if ($limit) {
                    $limit -= strlen($data);
                    $stop = $limit <= 0;
                }
            }
        }
        @fclose($fp);
        return $return;
    }
}


?>